Mobile bookcase



FIG. 1 is a perspective view of the mobile bookcase which illustrates the new design;

FIG. 2 is a front elevational view of the mobile bookcase of FIG. 1;

FIG. 3 is a left side elevation view of FIG. 1;

FIG. 4 is a right elevation view of FIG. 1;

FIG. 5 is a back elevation view of FIG. 1;

FIG. 6 is a bottom view of FIG. 1; and,

FIG. 7 is a top plan view of FIG. 1. 

The ornamental design for a mobile bookcase, as shown and described. 